Out filter Mate heavy duty softener cleaner intensely removes Lime, rust and other build-up that renders a softener useless. Regular use of out filter Mate softener cleaner protects a water softener from harmful build-up. This all-purpose formula teams with the softener salt to attack the harmful contaminants in water that affect the efficiency of a softener and eventually Destroy it. The mounted system with automatic dispensing wick, provides up to 2 months of cleaning. Out filter Mate heavy duty softener cleaner protects your softener investment by maintaining softener performance and extends the machine life.